Everyone seems to be talking about "sunk cost" here. But it seems like you're working on a product that believe in. Is it possible for you to disrupt the comp

Everyone seems to be talking about "sunk cost" here. But it seems like you're working on a product that believe in. Is it possible for you to disrupt the company's current trajectory and try to get things onto a better course? If your co-founders are doing things wrong, perhaps you can do some research into their side of things and figure out how to do things better. Teach them things, and learn together. Do their jobs for them if you have to. Since they are family, perhaps they will be easier to persuade?